Rules of conducting economic activity in Poland by foreigners
If you do not have Polish citizenship and you want to do business in Poland, you have the right to take up and pursue business activity. You can also establish a branch or a representative office of your company in Poland or offer or provide temporary services.

Establishing a company under the principles applicable to Polish enterpreneurs
If you meet any of the following conditions, you are bound by the same conditions and rules as Polish nationals and you can register activity in the same way as Polish nationals.

Forms of activity in Poland:
Company registration
sole trader
civil law partnership
other companies
National Court Register. You have the possibility to register a limited liability company and a limited partnership with the use of a model contract on-line through the portal of the portal of the Ministry of Justice, as well as by traditional means.
Establishing a company by other foreigners
If you do not meet any of these conditions, in order to run a business in Poland you may conduct it only in the form of partnerships: registered, limited liability, limited joint-stock, joint-stock.
You can also join such companies, acquire and subscribe for shares.
limited partnership
limited liability company
limited joint-stock partnership
joint-stock company
Cross-border services in Poland
Do you have the citizenship of one of the EU Member States and would like to temporarily provide services in Poland? You do not have to register activity in Poland. You can take advantage of the so-called cross-border service provision. It is temporary and occasional. Every service provider, including entrepreneurs from the EU, may temporarily provide services on a cross-border basis in another EU country, e.g. in Poland.
Cross-border services may be provided by:
Not all types of services can be provided within the framework of cross-border provision of services, e.g. transport, notary, pharmaceutical, medical, gambling services cannot be provided. This applies mainly to services the performance of which requires specialist qualifications or education. The list of exclusions from the cross-border provision of services is included in the Act on the rules of participation of foreign entrepreneurs and other foreign persons in the economic trade on the territory of Poland.
Branch of a foreign enterpreneur
Do you run a company in EU country? If so, you can open a branch in Poland. You can do business in the same way as you do abroad.
These rules also apply to non-EU citizens if they have mutual agreements with Poland.
Remember to:
It is necessary to use the name of the branch abroad, with the Polish translation of the legal form, and the phrase “branch in Poland” to designate the branch. Keep separate accounts in Polish, report all changes within 14 days.
MORE: Registration of a branch of a foreign company in the National Court Register
Representative office of foreign enterpreneurs
Important information:

Get:
Permission to subscribe for shares
If you wish to purchase or subscribe for shares in a company that owns a property, you must hold a special permit.
source: https://www.biznes.gov.pl/en/firma/doing-business-in-poland/company-registration-in-poland/rules-of-conducting-economic-activity-in-poland-by-foreigners
